Respiration: practice question

A Physiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Physiology · Respiration

Sample item

Which value is increased in dead-space ventilation?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Ventilation without perfusion

This item reviews Respiration; Ventilation without perfusion is the best answer because it directly fits the anatomical or physiological relationship described.

Option by option

  • A. Ventilation without perfusion (correct)

    Correct. Ventilation without perfusion matches the defining feature.

  • B. Hemoglobin

    Hemoglobin is not supported by the key finding.

  • C. Perfusion without ventilation

    Perfusion without ventilation does not match the stated relationship.

  • D. Alveolar oxygen only

    Alveolar oxygen only is plausible but is not the best answer.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Physiology questions

Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is A, Ventilation without perfusion. This item reviews Respiration; Ventilation without perfusion is the best answer because it directly fits the anatomical or physiological relationship described.

Why is "Hemoglobin" not the answer?

Hemoglobin is not supported by the key finding.

Why is "Perfusion without ventilation" not the answer?

Perfusion without ventilation does not match the stated relationship.

Why is "Alveolar oxygen only" not the answer?

Alveolar oxygen only is plausible but is not the best answer.

What concept does this question test?

It tests Respiration in Physiology. The correct option holds because: Correct. Ventilation without perfusion matches the defining feature.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Respiration?

For each system, sketch the key graph (pressure–volume loop, oxygen dissociation curve, nephron handling) and explain it aloud. Then use the flashcards and the other Physiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.